Undercutter.



- PATBNTED DEG. 15,1903.

J. PIERCE. UNDERGUTTER'. APPLIUATION FILED PBB.10,1903. I

.NO- MODBL.-- I

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UNITED STATES Patented December 15, 1903.

PATENT OFFICE.

UNDERCUTTER.

SPECIFICATION forming part of Letters Patent No. 747,083, dated December15, 1903. Application filed February 10, 1903. S i l No. 142,819. (Nomodel.)

To ctZZ whom it may concern.-

Be it known that I, JOSEPH PIEROE,a citizen of the United States,residing at Tumwater, in the county of Thurston, State ofWashington,have invented a new and useful Undercutter, of which thefollowing is a full, clear, and

exact description.

Reference is made to the accompanying drawings, forming a part of thisspecification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a side view of my undercutter, and Fig. 2 is an end View.

The object of my invention is to provide a simple and eflicient devicefor holding a saw in position to saw a log in the woods or elsewherefrom underneath when it is necessary to do so by reason of the log ortree lying in such a position as to bind on top so it cannot be sawedfrom the top, or where the pressure is upward at the place to be sawedand it is necessary to undercut it for a piece in order to prevent thetree from splitting, and thereby injuring the same.

My invention consists of a wheel a. with groove on the disk for back ofsaw to rest in whilein position for sawing from underneath, which wheelwill revolve as the saw is drawn back and forth in the operation ofsawing. The wheel is pivoted at c on an ax in the center toa shank b,which shank ends in a ball-socket d, Fig. 2. The ball-socket restsbetween two clamps g, which are held together by a barf, with threads onone end, which screws in one of the shanks and upon which end itis heldin place by a nut h. This bar is attached to a leverc. The clamps aretightened or loosened by turning the lever. The clamps have a groove andinward turn on the lower end to attach to the ax-handle or other supportj, used when it is placed in position to be used. By turning andunscrewing the lever the clamps will be drawn apart, and it will be seenthat the clamps will loosen, so it may bedetached from the axhandle orother support. By the same process and loosening the ball-socket isloosened, so that the wheel and shank may be adjusted in any position,so that in Fig. l the wheel and shank may present a side view or anydegree less, or in Fig. 2 the wheel and shank may present an end view orany degree less, or the wheel and shank may be revolved, so that thewheel a and the shank b will occupy a position at right angles with theclamps g or any degree less, or such a number of degrees more as willcause the wheel and shank to come in contact with the clamps g andsupport j.

My undercutter is small, light, of metal, and easily carried.

I am aware that prior to my invention contrivances for holding asaw'when sawing from underneath have been used; but such contrivanceonly consisted of a wheel.

What I do claim as myinvention, and what I desire to secure by LettersPatent, is-

The combination of wheel, with groove on its periphery, pivoted on ashank ending in a ball-socket, resting in clamps arranged so as to beattached to an ax-handle, or support, and thus to be adj ustable todifferent positions desired.

In testimony whereof I have subscribed my name to this specification inthe presence of two subscribing witnesses.

JOSEPH PIERCE. Witnesses:

P. M. TROY,

. O. J. FALKNOR.

